Re: Refracted ray

mc wrote:
> Thanks for the feedback Miles.  This makes for many assumptions as one
would 
> have to, if object are moving, say an ice cube in the water, have
dynamic 
> materials for the glass:
>    glass air
>    glass water
>    glass ice
> depending on where a ray is.
> Today I use a list of medium being traversed but I can't seem to be able
to 
> exit a material directly into another one..


Can you use a stack? Push the old IOR's as you enter a new medium (from 
the 'front' ), then pop them back when you exit a medium (from the back)